Less is more. Quality not quantity. Your energy is a finite resource, so spend it wisely. No matter what, keep school number one. Aikido will still be there when your done, and it doesn't cost $50k. Also, remember that people who are excellent (anyone can be average) at their craft/art/profession DO NOT multi-ask! While you can go to grad school, train Aikido and dance salsa, you're probably not going to do any of them particularly well, or to the best of you abilities (jack of all trades, master of none). Instead, the best of the best focus and refine, focus and refine. The world's best brain surgeon, while amazing in the operating room, is generally worthless in most other situations. Such is the price for mastery.